So I'm currently running windows 10 on a Lenovo ThinkPad P52, I would like to switch over to PureOS. I went to this link https://pureos.net/download/ and followed the instructions for downloading and installing it with a flash drive. However when is finishes downloading and I try using etcher to put it on my flash drive so I can boot the OS off of it, there is no OS that has been downloaded from what I can tell. There is just a 'DVD Drive PureOS 9.0 GNOME' with a picture of a disk next to it and I cant put anything inside into the etcher because it says its not bootable. And I can't just select the DVD Drive because etcher won't let me, it just wants to open it and select something inside. If I punch PureOS into my search bar nothing shows up except web searches, not even the DVD Drive file.